import edu.princeton.cs.algs4.StdDraw;

public class Main {

    public static void main(String[] args) {
        System.out.println("Hello World!");
        double[] x = {0.2,0.4,0.1,0.7};
        double[] y = {0.5,0.1,0.9,0.1};
        StdDraw.polygon(x,y);
    }
}
